In 1804 Sibthorp’s father, then Member for Lincoln, admonished him:
You have now taken your degree, and in doing so, have gratified my wishes. You leave college and academical life with character and credit ... May you resist every seduction from that honourable and dignified course.
Lincs. AO, Sibthorp mss, 3 Sib. 1/15.
In 1814 when a vacancy arose at Lincoln, Sibthorp’s uncle Richard Ellison, who already had a seat elsewhere, sponsored him as candidate and he was returned unopposed.
But alas! Sickness incapacitated him from paying that attention to his parliamentary duties which he so earnestly wished to pay. Colonel Sibthorp was an enthusiastic admirer of the principles of Mr Pitt, and consequently gave his support to the present ministry; yet he only supported those measures which his conscience assured him were for the good of his country. He was a true friend also to the doctrines and discipline of the Church of England, and those inroads which its pretended friends, but in reality its worst enemies are perpetually making upon it, were always discountenanced by him.
Gent. Mag. (1822), i. 281.
He died 9 Mar. 1822.
